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Medium severity · published Feb 28, 2026
CVE-2026-28556
wpForo Forum 2.4.14 Missing Authorization via Topic Management Form Handlers
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
wpForo Forum 2.4.14 contains a missing authorization vulnerability that allows authenticated subscribers to move, merge, or split any forum topic via the topic_move, topic_merge, and topic_split form action handlers. Attackers with a valid form nonce can reorganize arbitrary forum content without moderator permissions, including relocating topics to private forums.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WF
wpForo Forum · gVectors Team
2.4 before 2.4.16 · source: vendor, NVD
Affected product
WF
wpForo Forum
gVectors Team
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28556
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28556
Product
https://wordpress.org/plugins/wpforo/
Release Notes
https://wordpress.org/plugins/wpforo/#developers
Third Party Advisory
https://www.vulncheck.com/advisories/wpforo-forum-missing-authorization-via-topic-management-form-handlers
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